more earnings reports coming out today including apple, at&t and delta airlines. three biggies. nearly one-third of the companies in the s&p will report their results this week alone. the reports have been pretty good so far. on wall street the dow reversed an early slide yesterday and gained 19 points. the nasdaq climbed 27. >>> stock indices have more than doubled since the march 2009 bottom. but many investors still a little spooked by the markets. here to explain why is jill schlesinger, cbs news senior business analyst. >> reporter: good morning. >> ordinary investors might pile into stocks. tell us what's going on. >> reporter: well, it's so wild because the financial crisis and the subsequent 55% drop in stock indexes clearly have lot of a lasting impression on investors. according to bankrate.com's financial security index, a whopping 76% of respondents say they are just saying, no to stocks. that's a huge number. economists call this recency bias. we tend to use our resent experience as a guide for what's going to happen in the future. sohen stocks are soaring, we think